Quoted from the Kyocera catalog:

SunSaver Series - Charge and Load Controllers: Field proven reliability! SunSaver controllers are user selectable for sealed or flooded battery types, includes a charging LED and epoxy encapsulated circuitry in an anodized aluminum case with nickel plated brass binding clamp terminal screws.

• Designed for low noise
• Models are either 12V or 24V versions
• L models include load management, low voltage disconnect (LVD) red LED
• Self-consumption is 6.2mA
• Maximum wire size #10 AWG. CE, CSA, UL listed 1604 for Class 1 Div. 2 hazardous locations

Note: All models are the same size and weight: 6.0" x 2.18" x 1.32" (15.2cm x 5.5cm x 3.4cm) 0.01 cu.ft. / 0.5 lbs. (0.001 cu.m. / 0.23 kg)"

So, now you have the scoop on the SunSaver 10 (a 10 amp controller) and the Sunsaver 20L (a 20 amp controller with the L features listed above).